TiffCompression Enum

How TiffEncoder compresses the strips or tiles of a page.

public enum TiffCompression

Remarks

Every compression but TiffCompression.Jpeg is lossless: the decoded pixels are identical whichever one is chosen. The CCITT compressions code bilevel data and require TiffPixelLayout.Bilevel; TiffCompression.Jpeg requires TiffPixelLayout.Auto. Saving with another combination fails with an ArgumentException.

Name	Value	Description
`None`	`0`	No compression: the samples are stored as they are (`Compression` 1).
`Deflate`	`1`	Deflate, as Adobe's `Compression` 8 (a zlib datastream per strip). The default.
`Lzw`	`2`	LZW (`Compression` 5), as TIFF 6.0 defines it. No predictor is written for integer samples unless `TiffEncoder.Predictor` selects one.
`PackBits`	`3`	PackBits run lengths (`Compression` 32773): each row is packed separately.
`CcittModifiedHuffman`	`4`	CCITT modified Huffman run lengths (`Compression` 2): every row is coded in one dimension and starts on a byte boundary. Requires `TiffPixelLayout.Bilevel`.
`CcittGroup3`	`5`	CCITT Group 3 (T.4) facsimile coding (`Compression` 3), in one dimension, with an end-of-line code before each row and no fill bits. Requires `TiffPixelLayout.Bilevel`.
`CcittGroup4`	`6`	CCITT Group 4 (T.6) facsimile coding (`Compression` 4): the smallest lossless output for bilevel documents. Requires `TiffPixelLayout.Bilevel`.
`Jpeg`	`7`	Baseline JPEG (`Compression` 7, TIFF Technical Note 2): lossy. Each page is one strip that holds a complete JPEG datastream, grayscale for the gray pixel formats and YCbCr for the others (see `TiffEncoder.JpegQuality` and `TiffEncoder.JpegChromaSubsampling`). JPEG stores 8-bit samples without alpha: a 16-bit pixel format or a pixel that is not opaque is rejected with an `UnsupportedImageFeatureException`. Requires `TiffPixelLayout.Auto`.